Results 21 to 30 of about 1,283 (194)

Experimental Investigation of Flame Anchoring Behavior in a LOX/LNG Rocket Combustor

open access: yesAerospace, 2023
Hot fire tests of a multi-injector research combustor were performed with liquid-oxygen and liquefied-natural-gas (LOX/LNG) propellants at chamber pressures from 30 up to 67 bar, hence at conditions similar to an upper stage rocket engine.
Jan Martin   +4 more
doaj   +1 more source

Experimental assessment of the impact of variation in jet fuel properties on spray flame liftoff height

open access: yesApplications in Energy and Combustion Science, 2021
Ensuring efficient and clean combustion performance of liquid-fueled engines requires comprehension of the influence of fuel composition and properties on flame behavior, such as flame liftoff height (LOH) and lean blowout limit (LBO).
Radi Alsulami   +4 more
doaj   +1 more source

Stability and Liftoff of a N2-in-H2 Jet Flame in a Vitiated Co-flow at Atmospheric Pressure

open access: yesEurasian Chemico-Technological Journal, 2014
The stability and liftoff characteristics of a nitrogen (N2) diluted hydrogen (H2) jet flame in a vitiated co-flow are investigated experimentally with particular attention focused on regimes where multiple stabilization mechanisms are active ...
A. A. North   +4 more
doaj   +1 more source

Effect of N2 Replacement by CO2 in Coaxial-Flow on the Combustion and Emission of a Diffusion Flame

open access: yesEnergies, 2018
In this study, a double concentric burner burning methane with an annular coaxially-flowing oxidizer was adopted to operate the diffusion flame in lifted flame regime. The effects of coaxial-flow velocity, coaxial-flow composition variation through total
Haisheng Zhen, Zhilong Wei, Zhenbin Chen
doaj   +1 more source

Numerical study of a turbulent hydrogen flame in oxy-combustion regimes

open access: yesArchives of Mechanics, 2017
This paper presents the results of large eddy simulation/conditional moment closure (LES-CMC) computations of a turbulent flame in oxy-combustion regimes complemented by 0D-CMC analysis.
A. Wawrzak, A. Tyliszczak
doaj   +1 more source

Leading-Edge Velocities and Lifted Methane Jet Flame Stability

open access: yesJournal of Combustion, 2010
Current interest exists in understanding reaction-zone dynamics and mechanisms with respect to how they counterpropagate against incoming reactants.
W. Wang, K. M. Lyons
doaj   +1 more source

Experimental observation of the TJI-initiated HPDI gas combustion: Vertically crossed flame jet and methane jet

open access: yesApplications in Energy and Combustion Science, 2023
In the field of natural gas marine engines, the high-pressure direct injection (HPDI) technology is widely used to achieve emission reduction while maintaining equivalent thermal efficiency and power output compared to diesel engines.
Lijia Zhong   +3 more
doaj   +1 more source

Experimental Characterization of Two-Phase Aerated Liquid Ethanol and Jet A Spray Flames

open access: yesApplied Sciences, 2020
This work provides an analysis of an air-assisted atomizing nebulizer’s spray characteristics and combustion behaviors via application of various diagnostics.
Cary Smith   +3 more
doaj   +1 more source

Staged combustion concept for gas turbines

open access: yesJournal of the Global Power and Propulsion Society, 2017
Gas turbine power plants with high load flexibility are particularly suitable to compensate power fluctuations of wind and solar plants. Conventional gas turbines suffer from higher emissions at low load operation.
Dieter Winkler   +5 more
doaj   +1 more source

Designing Strong, Tough, Fire‐Retardant and Self‐Healing Elastomers with Phosphorus/Nitrogen‐ and Biphenyl‐Containing Segments

open access: yesAdvanced Materials, EarlyView.
By designing a P/N‐ and π–π interacting biphenyl‐containing diol as hard segments but side groups, a strong, tough, fire‐extinguishing and self‐healing elastomer is developed, demonstrating a break strain of ∼2500%, a toughness of 379 MJ/m3 and a tensile strength of 46 MPa, as well as a healing efficiency of 95% (tensile strength) and 99% (break strain)
Yijiao Xue   +11 more
wiley   +1 more source

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